Features: Powered by a rechargeable battery. No Gas/Fuel Is Required. Can be charged by using USB Slot and does not need fill any fuel into it. Does not create a flame, it is electrically operated and environmentally friendly It has a fashion outlook,that will make you to be very attractive in the group Only 1.5 hours per charge; Using high-performance polymer aluminum battery, it can charge and discharge about 500 times; This product USB connection only for charging, can be connected to a computer, cell phone chargers and other charging on any output voltage DC5V, output current is less than 3000MA charger; The initial use of long periods of non use, connect the charger, then disconnect and reconnect the charger. After fully charged immediately disconnect the power source. There are obvious current voice when using , very cool.​Our products are the best items in the which packed by gift box